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Finding the Fourth Proportional to 82,765.20, 124,147.80 and 69,934.80

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Solution

The fourth proportional to 82,765.20, 124,147.80 and 69,934.80 is: 104,902.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,765.20 : 124,147.80 = 69,934.80 : x
  2. Step 2: Convert to fraction form
    82,765.20/124,147.80 = 69,934.80/x
  3. Step 3: Cross multiply
    82,765.20x = 124,147.80 × 69,934.80
  4. Step 4: Simplify right side
    82,765.20x = 8,682,251,563.44
  5. Step 5: Solve for x
    x = 8,682,251,563.44/82,765.20
  6. Step 6: Final answer
    x = 104,902.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.